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Pérez-Jiménez M, Campos J, Jover J, Álvarez S, Carmona E. Coordination of E–C Bonds (E = Zn, Mg, Al) and the Zn–H Bonds of (C 5Me 5)ZnH and (C 5Me 5)ZnZnH across a Quadruply Bonded Dimolybdenum Dihydride Complex. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marina Pérez-Jiménez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO−CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avda. Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO−CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avda. Américo Vespucio, 49, 41092 Sevilla, Spain
| | - Jesús Jover
- Department de Química Inorgànica i Orgànica, Secció de Química Inorgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Santiago Álvarez
- Department de Química Inorgànica i Orgànica, Secció de Química Inorgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO−CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avda. Américo Vespucio, 49, 41092 Sevilla, Spain
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2
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Han Y, Meng Q, Rasulev B, May PS, Berry MT, Kilin DS. Photoinduced Charge Transfer versus Fragmentation Pathways in Lanthanum Cyclopentadienyl Complexes. J Chem Theory Comput 2017. [DOI: 10.1021/acs.jctc.7b00050] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yulun Han
- Department
of Chemistry, University of South Dakota, Vermillion, South Dakota 57069, United States
- Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Qingguo Meng
- Shenyang
Institute of Automation, Guangzhou, Chinese Academy of Sciences, Guangzhou 511458, China
| | - Bakhtiyor Rasulev
- Center
for Computationally Assisted Science and Technology, North Dakota State University, Fargo, North Dakota 58102, United States
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58102, United States
| | - P. Stanley May
- Department
of Chemistry, University of South Dakota, Vermillion, South Dakota 57069, United States
| | - Mary T. Berry
- Department
of Chemistry, University of South Dakota, Vermillion, South Dakota 57069, United States
| | - Dmitri S. Kilin
- Department
of Chemistry, University of South Dakota, Vermillion, South Dakota 57069, United States
- Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
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3
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Baillie RA, Legzdins P. The rich and varied chemistry of group 6 cyclopentadienyl nitrosyl complexes. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Piccoli PMB, Koetzle TF, Schultz AJ. SINGLE CRYSTAL NEUTRON DIFFRACTION FOR THE INORGANIC CHEMIST – A PRACTICAL GUIDE. COMMENT INORG CHEM 2007. [DOI: 10.1080/02603590701394741] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Chromium tricarbonyl complexes of 1,2-and 1,4-dihydronaphthalene. Synthesis and metal-induced thermal isomerizations involving endo-hydrogen atoms. Russ Chem Bull 2007. [DOI: 10.1007/s11172-007-0040-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Tsang JYK, Buschhaus MSA, Legzdins P, Patrick BO. Ortho-Selective C−H Activation of Substituted Benzenes Effected by a Tungsten Alkylidene Complex without Substituent Coordination. Organometallics 2006. [DOI: 10.1021/om060390j] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jenkins Y. K. Tsang
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Miriam S. A. Buschhaus
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Brian O. Patrick
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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Gądek A, Szymańska-Buzar T. Activation of the SiH bond of silanes in photochemical reactions with W(CO)6: Hydrosilylation of ketones and dehydrosilylation of alcohol by H2SiPh2. Polyhedron 2006. [DOI: 10.1016/j.poly.2005.10.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Chan MCW, Kui SCF, Cole JM, McIntyre GJ, Matsui S, Zhu N, Tam KH. Neutron and X-ray Diffraction and Spectroscopic Investigations of Intramolecular [CH⋅⋅⋅FC] Contacts in Post-Metallocene Polyolefin Catalysts: Modeling Weak Attractive Polymer–Ligand Interactions. Chemistry 2006; 12:2607-19. [PMID: 16363010 DOI: 10.1002/chem.200501054] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A family of Group 4 post-metallocene catalysts, supported by fluorine-functionalized tridentate ligands with the fluorine substituent in the locality of the metal center, is described. For the first time, the contentious C-H...F-C interaction has been characterized by a neutron diffraction study, which has allowed the position of the hydrogen atoms to be accurately determined. The nature of the weak intramolecular C-H...F-C contacts in these complexes in solution and the solid state was probed by using multinuclear NMR spectroscopy in tandem with neutron and X-ray crystallography. Evidence is presented to demonstrate that the spectroscopic C-H...F-C coupling occurs "through-space" rather than "through-bond" or by MF coordination. The titanium catalysts exhibit excellent activities and high co-monomer incorporation in olefin polymerization. The observed intramolecular C-H...F-C interactions are important with regards to potential applications in polyolefin catalysis because they substantiate the proposed ortho-F...H(beta) ligand-(polymer chain) contacts derived from DFT calculations for the remarkable fluorinated phenoxyimine Group 4 catalysts. Compared with agostic and co-catalyst...metal contacts, weak attractive noncovalent interactions between a polymer chain and a judiciously designed "active" ligand is a new concept in polyolefin catalysis.
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Affiliation(s)
- Michael C W Chan
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
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9
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Blackmore IJ, Jin X, Legzdins P. Distinctive Properties of Cp‘M(NO)(alkyl)2 (M = Mo, W) Complexes. Organometallics 2005. [DOI: 10.1021/om0504396] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian J. Blackmore
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Xing Jin
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
| | - Peter Legzdins
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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10
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Cho HG, Wang X, Andrews L. Reactions of Methane with Hafnium Atoms: CH2HfH2, Agostic Bonding, and (CH3)2HfH2. Organometallics 2005. [DOI: 10.1021/om050069l] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Han-Gook Cho
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4310
| | - Xuefeng Wang
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4310
| | - Lester Andrews
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4310
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11
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Handzlik J, Górski M, Szymańska-Buzar T. A potential route to the formation of alkylidene ligand from two mutually cis alkene ligands: a DFT study. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2004.11.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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12
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Lee K, Legzdins P, Pamplin CB, Patrick BO, Wada K. Intermolecular Activation of Hydrocarbon C−H Bonds Initiated by the Tungsten Hydrocarbyl Hydrido Complexes Cp*W(NO)(R)(H)(PMe3) (R = Alkyl, Aryl). Organometallics 2005. [DOI: 10.1021/om049137e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kajin Lee
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1, and Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Peter Legzdins
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1, and Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Craig B. Pamplin
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1, and Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Brian O. Patrick
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1, and Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kenji Wada
- Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1, and Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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13
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Cho HG, Andrews L. Formation of a Simple Hafnium Methylidene Complex by Reaction of Methyl Fluoride with Laser-Ablated Hafnium Atoms. Organometallics 2004. [DOI: 10.1021/om049681n] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Han-Gook Cho
- Department of Chemistry, P.O. Box 400319, Charlottesville, Virginia 22904-4319
| | - Lester Andrews
- Department of Chemistry, P.O. Box 400319, Charlottesville, Virginia 22904-4319
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14
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Cho HG, Andrews L. Persistent Photo-Reversible Transition-Metal Methylidene System Generated from Reaction of Methyl Fluoride with Laser-Ablated Zirconium Atoms and Isolated in a Solid Argon Matrix. J Am Chem Soc 2004; 126:10485-92. [PMID: 15315465 DOI: 10.1021/ja0486115] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A photoreversible transition-metal methylidene system has been formed for the first time by reaction of methyl fluoride and laser-ablated Zr atoms, isolated in solid argon, and investigated by means of infrared spectroscopy. Four different groups of absorptions are characterized on the basis of behaviors upon broad-band irradiation and sample annealing. Growth of Group I is accompanied by demise of Group II on irradiation with visible light (lambda > 530 nm) and vice versa with UV light (240 < lambda < 380 nm). The methylidene complex CH(2)=ZrHF is responsible for Groups I and II either in different singlet-triplet spin states or argon matrix packing configurations. The ground singlet state is stabilized by an agostic interaction. On the other hand, Group III, which arises from the Grignard type compound CH(3)-ZrF, disappears upon irradiation of UV light (lambda > 380 nm), increasing the concentration of CH(2)=ZrHF by alpha-H elimination. Fragments of methyl fluoride such as the CH(2)F radical comprise Group IV. Theoretical calculations are carried out for the alkylidene complex and other plausible products, and the results are compared with the experimental frequencies.
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Affiliation(s)
- Han-Gook Cho
- Contribution from the Department of Chemistry, P.O. Box 400319, University of Virginia, Charlottesville, VA 22904-4319, USA
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15
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Cho HG, Andrews L. Photoreversible Hydrogen Migration System in a Solid Argon Matrix Formed by the Reaction of Methyl Fluoride with Laser-Ablated Titanium Atoms. J Phys Chem A 2004. [DOI: 10.1021/jp0483775] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Han-Gook Cho
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319
| | - Lester Andrews
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319
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16
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Baratta W, Mealli C, Herdtweck E, Ienco A, Mason SA, Rigo P. Nonclassical vs Classical Metal···H3C−C Interactions: Accurate Characterization of a 14-Electron Ruthenium(II) System by Neutron Diffraction, Database Analysis, Solution Dynamics, and DFT Studies. J Am Chem Soc 2004; 126:5549-62. [PMID: 15113226 DOI: 10.1021/ja038986a] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A neutron diffraction study of the complex RuCl(2)[PPh(2)(2,6-Me(2)C(6)H(3))](2) (1) defines the precise nature of the delta agostic interactions between the unsaturated metal center and two o-methyl groups of the xylyl substituents. The CH(3) carbon atoms lie in the RuP(2) equatorial plane with Ru...C distances of 2.637(7) and 2.668(6) A, whereas four short Ru.H distances (from 2.113(11) to 2.507(11) A) indicate that each methyl group interacts with two C-H bonds. A survey of the X-ray structures with beta, gamma, delta, and epsilon M...H(3)C-C moieties (no neutron data have been previously reported) shows a linear correlation between the angle M.C-C and the torsion of the methyl group about the C-C bond. Thus, the agostic interactions span the range between the classical (M...eta(2)-HC) and the nonclassical (M...eta(3)-H(2)C) types. A solution study of 1 shows intramolecular rearrangement of each xylyl substituent that equilibrates the environments of its two ortho CH(3) groups. Activation parameters, evaluated from the analysis of (1)H NMR line shape as a function of temperature, are Delta H(++) = 9.6 +/- 0.2 kcal mol(-1) with Delta S(++) = -15.4 +/- 0.7 eu (CDCl(3)). The related 14-electron complexes RuX(2)[PPh(2)(2,6-Me(2)C(6)H(3))](2) (X = I, 2; NCO, 3), prepared from 1 and NaX, show a similar dynamic process in solution, with the iodo derivative displaying the most hindered rotation of the xylyl group. A DFT optimization of the complex RuCl(2)[PH(2)(2,6-Me(2)C(6)H(3))](2) (1a) reproduces well the nonclassical Ru...eta(3)-H(2)C agostic mode, whereas the classical Ru...eta(2)-HC one corresponds to a transition state 1b, destabilized by 3.4 kcal mol(-1). A similar barrier (ca. 3.8 kcal mol(-1)) is calculated for the xylyl rotation in the further simplified model RuCl(2)[PH(2)(2,6-Me(2)C(6)H(3))][PH(2)CH[double bond]CHCH(3)] (1c), the absence of bulky phenyl substituents being largely responsible for the difference with respect to the experimental value. Finally, the MO analysis addresses the intrinsic stability of the 14-electron complex RuCl(2)(PH(3))(2) and, in agostic complexes, accounts for the different interactions between the methyl group and the metal atom in relation to the length of their interconnecting chain.
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Affiliation(s)
- Walter Baratta
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy.
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Ng SHK, Adams CS, Legzdins P. Unusual thermal C-h bond activation by a tungsten allene complex. J Am Chem Soc 2002; 124:9380-1. [PMID: 12167026 DOI: 10.1021/ja026951p] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Gentle thermolysis of the 18e alkyl-allyl complex, CpW(NO)(CH(2)CMe(3))(eta(3)-3,3-Me(2)C(3)H(3)) (1), generates a reactive 16e allene intermediate, CpW(NO)(eta(2)-CH(2)=C=CMe(2)) (A), with the concomitant evolution of neopentane via hydrogen abstraction from the dimethylallyl ligand. A has been structurally characterized as its PMe(3) adduct and is capable of effecting single and multiple C-H bond activations of hydrocarbon solvents. For example, the thermal reaction of 1 with cyclohexane leads to the formation of the 18e cyclohexenyl hydrido complex, CpW(NO)(eta(3)-C(6)H(9))(H) (5), as a result of three successive C-H activations of the alkane solvent.
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Affiliation(s)
- Stephen H K Ng
- Department of Chemistry, The University of British Columbia, Vancouver, Canada V6T 1Z1
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